LensKit RecSys Toolkit
lenskit.org
LensKit RecSys Toolkit
@lenskit.org
Open-source toolkit for building, researching, and learning about recommender systems. https://lenskit.org
Spent some time today updating the list of #RecSys research using LensKit, and we're now at 105 known research products using LensKit for Python! lenskit.org/research/

As a friendly reminder, if you use LensKit in your research, please cite the CIKM'20 paper to help track usage.
LensKit — Research
lenskit.org
August 1, 2025 at 6:06 PM
The next LensKit release will be the biggest since the switch to Python, a fundamental paradigm shift to support better flexibility, easy correctness, and self-documentation. Still working on code, testing, and docs, but a preview: lkpy.lenskit.org/en/latest/gu...
Migrating from LensKit 0.x
LensKit 2025.1 brings the largest changes to LensKit’s APIs and operation since moving to Python. These changes are a result of years of experience using and teaching the current Python APIs, talki...
lkpy.lenskit.org
December 8, 2024 at 3:43 PM
Hello, world!
October 3, 2024 at 7:04 PM